The actress and Will McCormack wrote Celeste and Jesse Forever, which traces the crumbling romance of a married couple (Jones and Andy Samberg).
Speaking to The Huffington Post, Jones said the film's struggling romance reflects a "kind of trend" many of her friends have gone through.
"It was almost like a cultural phenomenon that we kept seeing. One was the Type A woman with the more laid-back, beta dude. And the other was people trying to stay friends. Because we wait so long to get married now," she explained.
She continued: "A lot of people we know would meet in college and fall in love, and you think this is the person they're gonna be with forever. But then there are all these choices, and people change, but you don't want to lose the person that you grew up with, because they're almost like a family member.
"So you try to do this selfish, unrealistic thing of keeping them around without really dealing with the fact that the dynamic has changed."
Jones also said that Celeste and Jesse Forever allowed her to indulge her love of romantic comedies.
"[I] grew up on them - and we wanted to write one that somehow had a new twist," the star explained. "But this felt really natural because we knew a lot of people in this scenario."
Elijah Wood, Emma Roberts and Ari Grayor round off the comedy's cast.
Celeste and Jesse Forever is now playing in the US. A UK release has not yet been confirmed.
Watch a trailer for Celeste and Jesse Forever below: